Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cross-linking type anion membrane and preparation method thereof

An anionic membrane, cross-linked technology, applied in electrical components, circuits, battery electrodes, etc., can solve problems such as the inability to meet the needs of industrialization, and the lack of in-depth reports on the chemical stability of membranes.

Inactive Publication Date: 2015-10-07
DALIAN UNIV OF TECH
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies on imidazole and guanidine as anion membrane exchange groups have been reported in many literatures, such as [J.H.Wang, et al., Macromol., 2010, 43, 3890], the alkali resistance of these imidazole and guanidine anion membranes Although it has been improved, it still cannot meet the needs of industrialization
[0006] Chinese patent [CN 102479962 A] prepares an anion membrane by cross-linking polymers containing benzyl halide groups through biguanide or polyguanide. The anion exchange membrane prepared by this technology has good thermal stability, but the chemical stability of the membrane is not deep enough. to report

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cross-linking type anion membrane and preparation method thereof
  • Cross-linking type anion membrane and preparation method thereof
  • Cross-linking type anion membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In a nitrogen atmosphere, at room temperature, dissolve tetramethylurea in dichloromethane, add oxalyl chloride dropwise, slowly raise the temperature to 60°C for 2 hours, and remove the solvent to obtain a white solid, which is Vilsmeyer salt, (tetramethylurea Urea: dichloromethane: oxalyl chloride = 9.6ml: 20ml: 10.2ml);

[0045] Dissolve 2 molar parts of Vilsmeyer salt prepared in 10 molar parts of acetonitrile, and slowly add 2 molar parts of 2-aminoimidazole after complete dissolution, and slowly raise the temperature to 90° C. for 24 hours. After the reaction was completed, 2M NaOH aqueous solution was added under ice-bath conditions to adjust the pH value of the reaction mixture to 9-14, and the mixture was vigorously stirred for 4 hours until the system became clear. Separate the organic phase, use 20mL ethyl acetate to extract the inorganic phase 5 times, combine the organic phases, dry with anhydrous sodium sulfate, remove solvent and extractant, obtain 2-imid...

Embodiment 2

[0051] In a nitrogen atmosphere, at room temperature, dissolve tetramethylurea in dichloromethane, add oxalyl chloride dropwise, slowly raise the temperature to 60°C for 2 hours, and remove the solvent to obtain a white solid, which is Vilsmeyer salt, (tetramethylurea Urea: dichloromethane: oxalyl chloride = 9.6ml: 20ml: 10.2ml);

[0052] Dissolve 2 molar parts of Vilsmeyer salt prepared in 10 molar parts of acetonitrile, and slowly add 2 molar parts of 2-aminoimidazole after complete dissolution, and slowly raise the temperature to 90° C. for 24 hours. After the reaction was completed, 2M NaOH aqueous solution was added under ice-bath conditions to adjust the pH value of the reaction mixture to 9-14, and the mixture was vigorously stirred for 4 hours until the system became clear. Separate the organic phase, use 20mL ethyl acetate to extract the inorganic phase 5 times, combine the organic phases, dry with anhydrous sodium sulfate, remove solvent and extractant, obtain 2-imid...

Embodiment 3

[0058] In a nitrogen atmosphere, at room temperature, dissolve tetramethylurea in dichloromethane, add oxalyl chloride dropwise, slowly raise the temperature to 60°C for 2 hours, and remove the solvent to obtain a white solid, which is Vilsmeyer salt, (tetramethylurea Urea: dichloromethane: oxalyl chloride = 9.6ml: 20ml: 10.2ml);

[0059] Get the Vilsmeyer salt of prepared 2 molar parts and be dissolved in the acetonitrile of 10 molar parts, slowly add the 2-aminoimidazole of 2 molar parts after dissolving completely, then add the triethylamine of 2 molar parts (as the acid agent that promotes reaction ), slowly warming up to 90°C for 24 hours. After the reaction was completed, 2M NaOH aqueous solution was added under ice-bath conditions to adjust the pH value of the reaction mixture to 9-14, and the mixture was vigorously stirred for 4 hours until the system became clear. Separate the organic phase, use 20mL ethyl acetate to extract the inorganic phase 5 times, combine the o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Water absorptionaaaaaaaaaa
Water absorptionaaaaaaaaaa
Login to View More

Abstract

The invention discloses a novel anion-exchange membrane and a preparation method thereof. The anion membrane is prepared from a polymer containing halomethyl group and a binary ionization reagent containing dual resonance effects by crosslinking, and the ionic group of the membrane is provided with dual resonance effects, so that the positive charges are distributed more dispersely and the membrane has better chemical stability under alkaline environment. The binary ion conduction group can effectively increase ion conductivity; in addition, crosslinking can inhibit swelling. The anion membrane prepared by the invention has the advantages of better chemical stability, higher conductivity and swelling resistance, and the membrane is suitable for application in the aspect of alkaline fuel cells.

Description

technical field [0001] The invention relates to the field of battery membrane materials, in particular to a cross-linked polymer anion membrane and a preparation method thereof. Background technique [0002] Energy crisis and environmental pollution have become the two most important problems facing today's society. As a new type of clean energy, fuel cells have attracted widespread attention from all over the world. Alkaline polymer fuel cells have achieved rapid development due to their fast reaction kinetics, the use of non-precious metal catalysts, no carbonate crystallization, and low fuel permeability. [0003] However, the commercialization of alkaline polymer fuel cells still faces many challenges. As a key material, anionic membranes have two major problems: low electrical conductivity and poor chemical stability in alkaline environments. Therefore, how to improve the chemical stability and conductivity of anion membranes has become an urgent problem to be solved. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M4/94H01M4/88C08J9/40C08J5/22C08J3/24
CPCC08J3/242C08J5/22C08J9/40C08J2381/06H01M4/8857H01M4/94Y02E60/50
Inventor 张凤祥程洁李晓亮
Owner DALIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com